Tiger Woods' #1 Mistress -- Party Pooper

1/19/2010 7:00 PM PST BY TMZ STAFF
All the married men who wanted to party with Tiger Woods' mistress Rachel Uchitel on her birthday are now gonna have to find something else to do that night -- because the shindig has officially been canceled.

Tiger Woods Mistress Rachel Uchitel
According to Rachel's lawyer, Gloria Allred, "The media attention was unexpected and unwelcome and for that reason the planned party at a club will not take place."

Interesting, since the invite has been floating around the Internet for days ... wonder how it leaked?